Computer-Based
Instruments
NI PXI-562xUser Manual
High-Speed Frequency-Domain Digitizer
NI PXI-562x User Manual
July 2002 Edition
Part Number 322949C-01
Support
Worldwide Technical Support and Product Information
ni.com
National Instruments Corporate Headquarters
11500 North Mopac Expressway Austin, Texas 78759-3504 USA Tel: 512 683 0100
Worldwide Offices
Australia 03 9879 5166, Austria 0662 45 79 90 0, Belgium 02 757 00 20, Brazil 011 3262 3599,
Canada (Calgary) 403 274 9391, Canada (Montreal) 514 288 5722, Canada (Ottawa) 613 233 5949,
Canada (Québec) 514 694 8521, Canada (Toronto) 905 785 0085, China 86 21 6555 7838,
Czech Republic 02 2423 5774, Denmark 45 76 26 00, Finland 09 725 725 11, France 01 48 14 24 24,
Germany 089 741 31 30, Greece 01 42 96 427, Hong Kong 2645 3186, India 91 80 4190000,
Israel 03 6393737, Italy 02 413091, Japan 03 5472 2970, Korea 02 3451 3400, Malaysia 603 9596711,
Mexico 001 800 010 0793, Netherlands 0348 433466, New Zealand 09 914 0488, Norway 32 27 73 00,
Poland 22 3390 150, Portugal 210 311 210, Russia 095 238 7139, Singapore 65 6 226 5886,
Slovenia 3 425 4200, South Africa 11 805 8197, Spain 91 640 0085, Sweden 08 587 895 00,
Switzerland 056 200 51 51, Taiwan 02 2528 7227, United Kingdom 01635 523545
For further support information, see the Technical Support and Professional Services appendix. To comment on
the documentation, send email to techpubs@ni.com.
© 2001–2002 National Instruments Corporation. All rights reserved.
Important Information
Warranty
The NI PXI-5620 and the NI PXI-5621 is warranted against defects in materials and workmanship for a period of one year from the date of
shipment, as evidenced by receipts or other documentation. National Instruments will, at its option, repair or replace equipment that proves to
be defective during the warranty period. This warranty includes parts and labor.
The media on which you receive National Instruments software are warranted not to fail to execute programming instructions, due to defects
in materials and workmanship, for a period of 90 days from date of shipment, as evidenced by receipts or other documentation. National
Instruments will, at its option, repair or replace software media that do not execute programming instructions if National Instruments receives
notice of such defects during the warranty period. National Instruments does not warrant that the operation of the software shall be
uninterrupted or error free.
A Return Material Authorization (RMA) number must be obtained from the factory and clearly marked on the outside of the package before
any equipment will be accepted for warranty work. National Instruments will pay the shipping costs of returning to the owner parts which are
covered by warranty.
National Instruments believes that the information in this document is accurate. The document has been carefully reviewed for technical
accuracy. In the event that technical or typographical errors exist, National Instruments reserves the right to make changes to subsequent
editions of this document without prior notice to holders of this edition. The reader should consult National Instruments if errors are suspected.
In no event shall National Instruments be liable for any damages arising out of or related to this document or the information contained in it.
XCEPT AS SPECIFIED HEREIN,NATIONAL INSTRUMENTS MAKES NO WARRANTIES, EXPRESS OR IMPLIED, AND SPECIFICALLY DI SCLAIMS ANY WARRANTY OF
E
MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE
NATIONAL INSTRUMENTS SHALL BE LIMITED TO THE AM OUNT THERETOFORE PAID BY THE CUSTOMER.NATIONAL INSTRUMENTS WILL NOT BE LIABLE FOR
DAMAGES RESULTING FROM LOSS OF DATA
. This limitation of the liability of National Instruments will apply regardless of the form of action, whetherin contract or tort, including
THEREOF
negligence. Any action against National Instruments must be brought within one year after the cause of action accrues. National Instruments
shall not be liable for any delay in performance due to causes beyond its reasonable control. The warranty provided herein does not cover
damages, defects, malfunctions, or service failures caused by owner’s failure to follow the National Instruments installation, operation, or
maintenance instructions; owner’s modification of the product; owner’s abuse, misuse, or negligent acts; and power failure or surges, fire,
flood, accident, actions of third parties, or other events outside reasonable control.
, PROFITS, USE OF PRODUCTS, OR INCIDENTAL OR CONSEQUENTIAL DAMAGES, EVEN IF ADVISED OF THE POSSIBILITY
Copyright
Under the copyright laws, this publication may not be reproduced or transmitted in anyform, electronic or mechanical, including photocopying,
recording, storing in an information retrieval system, or translating, in whole or in part, without the prior written consent of National
Instruments Corporation.
Trademarks
CVI™,LabVIEW™,MITE™,MXI™, National Instruments™,NI™, and ni.com™are trademarks of National Instruments Corporation.
Product and company names mentioned herein are trademarks or trade names of their respective companies.
.CUSTOMER’S RIGHT TO RECOVER DAMAGES CAUSED BY FAULT OR NEGLIGENCE ON THE PART OF
Patents
For patents covering National Instruments products, refer to the appropriate location: Help»Patents in your software, the
on your CD, or
ni.com/patents
.
patents.txt
file
WARNING REGARDING USE OF NATIONAL INSTRUMENTS PRODUCTS
(1) NATIONAL INSTRUMENTS PRODUCTS ARE NOT DESIGNED WITH COMPONENTS AND TESTING FOR A LEVEL OF
RELIABILITY SUITABLE FOR USE IN OR IN CONNECTION WITH SURGICAL IMPLANTS OR AS CRITICAL COMPONENTS IN
ANY LIFE SUPPORT SYSTEMS WHOSE FAILURE TO PERFORM CAN REASONABLY BE EXPECTED TO CAUSE SIGNIFICANT
INJURY TO A HUMAN.
(2) IN ANY APPLICATION, INCLUDING THE ABOVE, RELIABILITY OF OPERATION OF THE SOFTWARE PRODUCTS CAN BE
IMPAIRED BY ADVERSE FACTORS, INCLUDING BUT NOT LIMITED TO FLUCTUATIONS IN ELECTRICAL POWER SUPPLY,
COMPUTER HARDWARE MALFUNCTIONS, COMPUTER OPERATING SYSTEM SOFTWARE FITNESS, FITNESS OF COMPILERS
AND DEVELOPMENT SOFTWARE USED TO DEVELOP AN APPLICATION, INSTALLATION ERRORS, SOFTWARE AND
HARDWARE COMPATIBILITY PROBLEMS, MALFUNCTIONS OR FAILURES OF ELECTRONIC MONITORING OR CONTROL
DEVICES, TRANSIENT FAILURES OF ELECTRONIC SYSTEMS (HARDWARE AND/OR SOFTWARE), UNANTICIPATED USES OR
MISUSES, OR ERRORS ON THE PART OF THE USER OR APPLICATIONS DESIGNER (ADVERSE FACTORS SUCH AS THESE ARE
HEREAFTER COLLECTIVELY TERMED “SYSTEM FAILURES”). ANY APPLICATION WHERE A SYSTEM FAILURE WOULD
CREATE A RISK OF HARM TO PROPERTY OR PERSONS (INCLUDING THE RISK OF BODILY INJURY AND DEATH) SHOULD
NOT BE RELIANT SOLELY UPON ONE FORM OF ELECTRONIC SYSTEM DUE TO THE RISK OF SYSTEM FAILURE. TO AVOID
DAMAGE, INJURY, OR DEATH, THE USER OR APPLICATION DESIGNER MUST TAKE REASONABLY PRUDENT STEPS TO
PROTECT AGAINST SYSTEM FAILURES, INCLUDING BUT NOT LIMITED TO BACK-UP OR SHUT DOWN MECHANISMS.
BECAUSE EACH END-USER SYSTEM IS CUSTOMIZED AND DIFFERS FROM NATIONAL INSTRUMENTS' TESTING
PLATFORMS AND BECAUSE A USER OR APPLICATION DESIGNER MAY USE NATIONAL INSTRUMENTS PRODUCTS IN
COMBINATION WITH OTHER PRODUCTS IN A MANNER NOT EVALUATED OR CONTEMPLATED BY NATIONAL
INSTRUMENTS, THE USER OR APPLICATION DESIGNER IS ULTIMATELY RESPONSIBLE FOR VERIFYING AND VALIDATING
THE SUITABILITY OF NATIONAL INSTRUMENTS PRODUCTS WHENEVER NATIONAL INSTRUMENTS PRODUCTS ARE
INCORPORATED IN A SYSTEM OR APPLICATION, INCLUDING, WITHOUT LIMITATION, THE APPROPRIATE DESIGN,
PROCESS AND SAFETY LEVEL OF SUCH SYSTEM OR APPLICATION.
Compliance
FCC/Canada Radio Frequency Interference Compliance*
Determining FCC Class
The Federal Communications Commission (FCC) has rules to protect wireless communications from interference. The FCC
places digital electronics into two classes. These classes are known as Class A (for use in industrial-commercial locations only)
or Class B (for use in residential or commercial locations). Depending on where it is operated, this product could be subject to
restrictions in the FCC rules. (In Canada, the Department of Communications (DOC), of Industry Canada, regulates wireless
interference in much the same way.)
Digital electronics emit weak signals during normal operation that can affect radio, television, or other wireless products. By
examining the product you purchased, you can determine the FCC Class and therefore which of the two FCC/DOC Warnings
apply in the following sections. (Some products may not be labeled at all for FCC; if so, the reader should then assume these are
Class A devices.)
FCC Class A products only display a simple warning statement of one paragraph in length regarding interference and undesired
operation. Most of our products are FCC Class A. The FCC rules have restrictions regarding the locations where FCC Class A
products can be operated.
FCC Class B products display either a FCC ID code, starting with the letters EXN,
or the FCC Class B compliance mark that appears as shown here on the right.
Consult the FCC Web site at
http://www.fcc.gov
FCC/DOC Warnings
This equipment generates and uses radio frequency energyand, if not installed and used in strict accordance with the instructions
in this manual and the CE Mark Declaration of Conformity**, may cause interference to radio and television reception.
Classification requirements are the same for the Federal Communications Commission (FCC) and the Canadian Department
of Communications (DOC).
Changes or modifications not expressly approved by National Instruments could void the user’s authority to operate the
equipment under the FCC Rules.
for more information.
Class A
Federal Communications Commission
This equipment has been tested and found to comply with the limits for a Class A digital device, pursuant to part 15 of the FCC
Rules. These limits are designed to provide reasonable protection against harmful interference when the equipment is operated
in a commercial environment. This equipment generates, uses, and can radiate radio frequency energy and, if not installed and
used in accordance with the instruction manual, may cause harmful interference to radio communications. Operation of this
equipment in a residential area is likely to cause harmful interference in which case the user will be required to correct
the interference at his own expense.
Canadian Department of Communications
This Class A digital apparatus meets all requirements of the Canadian Interference-Causing Equipment Regulations.
Cet appareil numérique de la classe A respecte toutes les exigences du Règlement sur le matériel brouilleur du Canada.
Class B
Federal Communications Commission
This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to part 15 of the
FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation.
This equipment generates, uses, and can radiate radio frequency energy and, if not installed and used in accordance with the
instructions, may cause harmful interference to radio communications. However, there is no guarantee that interference will not
occur in a particular installation. If this equipment does cause harmful interference to radio or television reception, which can
be determined by turning the equipment off and on, the user is encouraged to try to correct the interference by one or more of
the following measures:
• Reorient or relocate the receiving antenna.
• Increase the separation between the equipment and receiver.
• Connect the equipment into an outlet on a circuit different from that to which the receiver is connected.
• Consult the dealer or an experienced radio/TV technician for help.
Canadian Department of Communications
This Class B digital apparatus meets all requirements of the Canadian Interference-Causing Equipment Regulations.
Cet appareil numérique de la classe B respecte toutes les exigences du Règlement sur le matériel brouilleur du Canada.
Compliance to EU Directives
Readers in the European Union (EU) must refer to the Manufacturer’s Declaration of Conformity (DoC) for information**
pertaining to the CE Mark compliance scheme. The Manufacturer includes a DoC for most every hardware product except for
those bought for OEMs, if also available from an original manufacturer that also markets in the EU, or where compliance is not
required as for electrically benign apparatus or cables.
To obtain the DoC for this product, click Declaration of Conformity at
by product family. Select the appropriate product family, followed by your product, and a link to the DoC appears in Adobe
Acrobat format. Click the Acrobat icon to download or read the DoC.
* Certain exemptions may apply in the USA, see FCC Rules §15.103 Exempted devices,and§15.105(c). Also available in
sections of CFR 47.
** The CE Mark Declaration of Conformity will contain important supplementary information and instructions for the user or
installer.
ni.com/hardref.nsf/
. This Web site lists the DoCs
Contents
About This Manual
Conventions ...................................................................................................................ix
Related Documentation..................................................................................................x
Chapter 1
Taking Measurements with the NI PXI-562x
Installing the Software and Hardware ........................................................................... 1-1
Configuring and Testing the Digitizer ........................................................................... 1-2
Acquiring Data Programmatically ................................................................................. 1-3
Safety Information .........................................................................................................1-4
Chapter 2
Hardware Overview
How the NI 562x Works ................................................................................................2-1
Connecting Signals..........................................................................................2-2
Conditioning the Signal—Impedance, Dither, Gain, and AC Coupling .........2-3
Input Impedance ...............................................................................2-3
Dither ................................................................................................ 2-3
Digitizing the Signal—The ADC ....................................................................2-3
Incorporating the DDC.................................................................................... 2-4
Storing Data in Memory..................................................................................2-4
Block Diagram .............................................................................................................. 2-5
Other Features................................................................................................................2-6
Multiple-Record Acquisitions .........................................................................2-6
Triggering ........................................................................................................2-7
Calibration .....................................................................................................................2-7
Synchronizing Multiple PXI Devices ............................................................................2-8
Appendix A
Technical Support and Professional Services
Glossary
Index
© National Instruments Corporation vii NI PXI-562x User Manual
About This Manual
The NI PXI-562x is a single-channel high-speed digitizer module whose
dynamic range and resolution are optimized for frequency-domain analysis
applications in research, product design and validation, and manufacturing
test. This manual provides information on installing, connecting signals to,
and acquiring data from the NI PXI-562x. This manual also provides an
overview of the features, functionality, and use of the NI PXI-562x
high-speed digitizer module.
Conventions
The following conventions are used in this manual:
<> Angle brackets that contain numbers separated by an ellipsis represent a
range of values associated with a bit or signal name—for example,
DBIO<3..0>.
» The » symbol leads you through nested menu items and dialog box options
to a final action. The sequence File»Page Setup»Options directs you to
pull down the File menu, select the Page Setup item, and select Options
from the last dialog box.
This icon denotes a note, which alerts you to important information.
This icon denotes a caution, which advises you of precautions to take to
avoid injury, data loss, or a system crash.
bold Bold text denotes items that you must select or click in the software, such
as menu items and dialog box options. Bold text also denotes parameter
names.
italic Italic text denotes variables, emphasis, a cross reference, or an introduction
to a key concept. This font also denotes text that is a placeholder for a word
or value that you must supply.
monospace
© National Instruments Corporation ix NI PXI-562x User Manual
Text in this font denotes text or characters that you should enter from the
keyboard, sections of code, programming examples, and syntax examples.
This font is also used for the proper names of disk drives, paths, directories,
programs, subprograms, subroutines, device names, functions, operations,
variables, filenames and extensions, and code excerpts.
About This Manual
Related Documentation
The following documents contain information that you might find helpful
as you read this manual:
• NI PXI-5620 Specifications
• NI PXI-5621 Specifications
• NI-SCOPE User Manual
• Spectral Measurements Toolset User Guide
NI PXI-562x User Manual x ni.com
Taking Measurements
with the NI PXI-562x
The NI PXI-5620 is a 64 Ms/s, 14-bit frequency-domain digitizer
module optimized for the best possible noise and distortion performance
in a 5–25 MHz passband. It has a –3 dB front-end bandwidth from
10 kHz to 36 MHz, and is always AC-coupled, meaning it does not admit
DC components of a signal.
The NI PXI-5621 is a DC-coupled version of the NI PXI-5620, optimized
for a passband of 0–25 MHz. Except for its permanent DC coupling and
wider front-end bandwidth, the NI PXI-5621 is functionally identical to the
NI PXI-5620.
Refer to the NI PXI-5620 Specifications and the NI PXI-5621
Specifications documents for NI PXI-562x performance specifications.
This chapter provides information on installing, connecting signals to,
and acquiring data from the NI 562x modules.
The NI 562x family of high-speed digitizers has the following features:
• A 14-bit, 64 MS/s analog-to-digital converter (ADC)
• 32 or 64 MB deep onboard sample memory
1
Installing the Software and Hardware
Perform the following steps to set up your digitizer:
1. If you are using an application development environment (ADE) or
third-party tool, install it now if you have not already done so. The
supported ADEs include LabVIEW, LabWindows/CVI, and other C or
C++ environments.
Note
Yo u must install all of the included software before installing your hardware.
2. Install NI-SCOPE. The included NI-SCOPE CD contains the software
you need to configure, test, and program operation of the NI 562x.
© National Instruments Corporation 1-1 NI PXI-562x User Manual
Chapter 1 Taking Measurements with the NI PXI-562x
a. Insert your NI-SCOPE CD into your CD drive. If installation does
not start automatically, navigate to your CD drive and click
setup.exe
b. To install both the instrument driver and ADE examples, select the
Programmatic and Interactive Support option when prompted.
3. Install the Spectral Measurements Toolset (SMT) CD, if included.
The SMT provides frequency-domain functionality and examples.
If installation does not start automatically, navigate to your CD drive
and click
setup.exe
.
.
Caution
Yo u must turn off and unplug your chassis before installing your device.
To prevent damage due to electrostatic discharge or contamination, handle the device using
the edges or the metal bracket.
4. Install your digitizer as shown in Figure 1-1.
PXI Chassis
O
N
S
T
A
N
D
B
Y
1
2
3
4
5
6
7
8
Your PXI Device
Ejector Handle in
Down Position
Figure 1-1. PXI Installation
Configuring and Testing the Digitizer
To configure and test your NI 562x, complete the following steps:
1. Launch Measurement & Automation Explorer.
2. Double-click Devices and Interfaces to open a list of recognized
devices.
NI PXI-562x User Manual 1-2 ni.com
Chapter 1 Taking Measurements with the NI PXI-562x
3. Find the NI 562x in the list. Notice the device number assigned to your
NI 562x. You need this device number to program your NI 562x.
4. Right-click the device name, and select Properties from the menu.
5. From the Properties window, click Test Resources to test the device
resources. A dialog box appears and indicates if the resource test has
passed.
6. Click Run Test Panels to run the functional test panels and begin
using your NI 562x. Connect a signal to your digitizer, and select
appropriate parameters.
7. Click Advanced to enable triggering options.
8. Click Close when you finish testing your NI 562x.
9. Click OK in the Properties window.
You have successfully installed and configured the necessary software and
hardware to use your NI 562x.
Acquiring Data Programmatically
You can acquire data programmatically either by writing an application for
your NI 562x or by using one of the examples that ships with NI-SCOPE.
For time-domain examples, go to the following default locations:
• LabVIEW examples are located in the Functions palette at
Instrument I/O»Instrument Drivers»NI SCOPE»IF Digitizers.
• Examples for C and Visual Basic programmers using
Windows Me/98/95 are located in
Examples
.
vxipnp\win95\niScope\
• Examples for C programmers using Windows 2000/NT are located at
vxipnp\winnt\niScope\Examples\c
.
• Examples for Visual Basic programmers using Windows 2000/NT are
located at
vxipnp\winnt\niScope\Examples\VisualBasic
.
• LabWindows/CVI examples are located at
cvi\NI-SCOPE Support\samples\niScope\cvi
Note
If you installed the examples in a different location, your file paths differ from the
.
default locations above.
© National Instruments Corporation 1-3 NI PXI-562x User Manual
Loading...